From: Jan Hubicka <hubicka@ucw.cz>
Date: Thu, 11 Jan 2018 08:14:33 +0000 (+0100)
Subject: re PR tree-optimization/83189 (internal compiler error: in probability_in, at profile... 
X-Git-Tag: basepoints/gcc-9~2064
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=29c02e655dca7391afb7f2cbfab7c7bcb68361ac;p=thirdparty%2Fgcc.git

re PR tree-optimization/83189 (internal compiler error: in probability_in, at profile-count.h:1050)


	PR middle-end/83189
	* gfortran.fortran-torture/compile/pr83189.f90: New testcase.
	* tree-ssa-loop-manip.c (tree_transform_and_unroll_loop): Handle zero
	profile.

From-SVN: r256480
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 1a55b2010907..32652720c897 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2018-01-10  Jan Hubicka  <hubicka@ucw.cz>
+
+	PR middle-end/83189
+	* gfortran.fortran-torture/compile/pr83189.f90: New testcase.
+	* tree-ssa-loop-manip.c (tree_transform_and_unroll_loop): Handle zero
+	profile.
+
 2018-01-10  Jan Hubicka  <hubicka@ucw.cz>
 
 	PR middle-end/83575
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 68fe8ef65bef..917370960c43 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2018-01-10  Jan Hubicka  <hubicka@ucw.cz>
+
+	PR middle-end/83189
+	* gfortran.fortran-torture/compile/pr83189.f90: New testcase.
+
 2018-01-10  Jan Hubicka  <hubicka@ucw.cz>
 
 	* gcc.c-torture/compile/pr83575.c: New testcase.
diff --git a/gcc/testsuite/gfortran.fortran-torture/compile/pr83081.f90 b/gcc/testsuite/gfortran.fortran-torture/compile/pr83189.f90
similarity index 100%
rename from gcc/testsuite/gfortran.fortran-torture/compile/pr83081.f90
rename to gcc/testsuite/gfortran.fortran-torture/compile/pr83189.f90
diff --git a/gcc/tree-ssa-loop-manip.c b/gcc/tree-ssa-loop-manip.c
index 80e91d0f0aa6..bf425afd4360 100644
--- a/gcc/tree-ssa-loop-manip.c
+++ b/gcc/tree-ssa-loop-manip.c
@@ -1378,7 +1378,8 @@ tree_transform_and_unroll_loop (struct loop *loop, unsigned factor,
     {
       /* Avoid dropping loop body profile counter to 0 because of zero count
 	 in loop's preheader.  */
-      freq_e = freq_e.force_nonzero ();
+      if (freq_h.nonzero_p () && !(freq_e == profile_count::zero ()))
+        freq_e = freq_e.force_nonzero ();
       scale_loop_frequencies (loop, freq_e.probability_in (freq_h));
     }